You can find womens fashion boots in so many delicious styles - from flat to tall, wedge to platform, ankle booties to thigh high boots, leather, patent, etc. I have to admit that I'm always tempted to buy several pairs to spruce up my wardrobe. I practically live in boots during the Fall/Winter months!
Of course, there is no rule that says that you can't wear boots during summer. You just need to get the right pair that won't look too harsh on your outfit (or weather!) - like for example a pair of lightweight fashion boots in either tan, cream or white.